Eru created all the valor and he gave them very specific abilities and can basically do anything. if he disapproved of morgoth then he could have destroyed him. however my theroy is that eru knew what morgoth would become and allowed it/planned for it. for i believe you cannot have true happiness without having a frame of reference. morgoth provides that frame of reference. by the fact he believes himself evil means he must have been designed that way. therefor can we conclude that eru approves of morgoth?